Plug terminal



Aug. 3 1926. y 1,594,456

v A. A. CONWAY lPLUG -TERMINAL Filed June e, 1925 I Suor w u PatentedAug. 3, 1926.

UNITED S'l T E S ALFRED A. CONWAY, OF LOYALIST, ALBERTA, CANADA..

PLUG frumviinar..

Application led .Time 8, 1925. Serial No. 35,754.

The present invention relates to terminals for use. in connection withelectricity, and has particular reference to terminals adapted for usein electromagnetic circuits.

.An object of this invention is to provide a device of this characterwhich may be used without the application of tools and still provide afirm and positive connection.

Another objectof this invention is to provide a device Jto-which a. wireor the lil/re may be attached withoutI severing the wire or drawing the.same through a hole.

A further object of this invention is to provide a device which may haveits outer members tho-roughly insulated so that there is no possibilityof a short circuit occurring should a live wire fall upon the terminal.

A still further object of this invention is to provide a device throughwhich a connection may be made or broken by a slight forward movement ofthe shell or head.

The above and. various other objects and advantages of this inventionwill in part be described in, and in part be understood from thefollowing detailed description of the present preferred embodiment, thesame being illustrated in the accompanying drawingr` wherein:

Fig. 1 isa transverse section taken longitudinally through a deviceconstructed according to the present invention.

Fig'. 2 is a detail side elevation of the same.

Fig. 3 is a. longitudinal. section taken through the body of the device.

Fig; 4 is a detail sideelevat-ionof the plunger or plug.

Fin'. 5 is a transverse section talren on substantially the line zi-5 ofFig. 1 and looking in the direction of the arrows.

Fig. 6 is a` transverse section taken on the line 6 6 of Fig. 1, and

Fig. 7 is a transverse section talren on the line 7-7 of Fig. l.

Referring to the drawing, 10 designates a panel or board upon which thisdevice may be mounted, and which has an opening 11 through which thebolt or stem 12 is adapted. to pass. The lower end of the stem 12 ispreferably threaded to receive. a nut 13 or the like, and a washer A: ispreferably interposed between the inner side of the nut 13 and the.panel 10 to provide a bearing surface for the nut.

The bolt 12 is provided with a head 15 upon the outer surface of whichis mounted a yieldable ball member 1.6. The ball 16 is ],Drovided` witha plurality of slots 17 which are adapted to make the ball l5 yieldablc.A casing 18 is adapted to enrage at its lower end the ball. 16, and fortl -s purpose is provided with a or'grroove lfl'inwhich the hall 16 islirinly held in posit" n. The casingv 18 may be constructed of u alsimilar to that of the bolt 12 and ball 16.

The outer end of the casing; 18 is preferably open and a yieldable plus;or plunger 20'is adapted to be loosely mounted therein. A helicalspring; 21 is mounted within the casing' 18 and at. one end enga-ges theouter surf-ace of the ball 16, and at the other end engages the innerend of the plunger 20.

An insulating shell or casing 22 is adapted to surround the casing 18,and at its lower end is provided with a shoulder or flange 23 which isadapted to engage the outer surface of the head 15 and the inner end ofthe casina` 18. The plunger 2O is provided with a cap 24 which ispreferably constructed of insulating material similar to the casing; 22.rEhe inner end of the cap /l is loosely mounted upon the casing 22 sothat it may freely slide thereupon.

ln order to restrict the movement of the plunger 20 and the cap 2li, anopening 25 is provided at opposite sides of the cylinders 18 and 22, anda pin 26 is mounted in the plug 20 and at opposite ends extends throughthe plug so that it will loosely enin the openings 25.

Intermediate the ends of the casings 18 and 22 there is provided anopening 27, and the plunger .20 has a slot or opening 28, which isadapted to register with the opening 27 when the plunger 2O is pressedinwardly, and a wire end 29 may be inserted therein.

In the operation of this device, the bolt 12 may be secured to a panel10 by the nut 13, and if desired the end of awire may be inserted underthe nut 13 in place of the washer 14;. The cap 2li may then be pressedforwardly until the opening 28 in the plunger 2O registers with theopening 27 of the casings 18 and 22. The end of a` wire or the like maythen be inserted in the opening 28, and with the release of the pressureupon the cap 24 the helical spring `21 forces the plunger outwardly vuntil the wire is 'iirnily held Within the openings and against theplungerO.. andwthe casing. 18N

It is, `of course, runderstood that various y changes and modificationsmay be made in the details of construction and designv of the abovespecifically described' embodimentk ot the invention Without departingfronrthe..

spirit thereof, such changes and modifications being restricted only bythe lscope ot the following claims.

7h-at iselaimed is:

l. A terminal comprising a yieldable base,- an inner and an outerAeasing.-seeured to the base, said-inner and outer easings having, aslotin the-side thereof, a plunger slid-f a yieldable ball head, 'acasing adapted to be' detachably inounted -on-fsaidbase, a pl-ungershdablyf inountedin said easing, stop means fory determining thatimovement-'vofE said-Y plunger., an insulating shell surrounding saideasing, and. an 'insulatingeap Vinounted on said plunger, said cap alsobeing adapted to telescope said shell.A-v

Sf-Aterininal comprising a basehaving a yieldable ball head, a metalliccasing havinga groove in the inner lower end thereof,^said 'head beingadapted to seat in said groove, a plunger loosely mounted in saidcasing, a spring in said casing, said spring engaging. `theinner end ofsaid plunger for urging' the saine outwardly, an insulatingeasing@surrounding-y said ,metallic casing,

yeaidiinetalli'e andinsulatingecasings having a transverse slotftherelnysald plunger hav.-A lng a transverse slot there1n,-an'insulating' eapfor said plunger, ,and stop. ineans `'for determiningthe moveinentof the plunger.

4. A termina-l comprising a base having a split ballhead,-a easingadaptedV to be def taohably mounted on saidz base, a plunger sl'idably.mounted in said Casingstopf'means fon'deteriniin'ng the moveinentof said1 lun "er, anwinsulatino shell Asurroundin@r 1 ZD b said casing, and'an-insulating cap `mounted onsaid plunger, said'rcap when urged-down-Wardly hein adapted -to telescope the :upper end of. said insulatingshell..

ALFRED .A. CON AY.

